the dollar price for a barrel of oil sold at a certain oil refinery tends to follow the demand equation below where x is the number of barrels of oils on the hand in ( millions ) a) how much should be charged for a barrel of oil if there are 6 million

2 answers

It would help if you proofread your questions before you posted them.

What equation?
The dollar price for a barrel of oil sold at a certain oil refinery tends to follow the demand equation​ below, where xx is the number of barrels of oil on hand​ (in millions).
​a) How much should be charged for a barrel of oil if there are 66 million barrels on ​ hand?
​b) What quantity xx will maximize​ revenue?
​c) What price should be charged in order to maximize​ revenue?
ppequals=negative one fifth x plus 160−
1
5x+160